This paper proposed a new OFDM scheme called damped zero-pseudorandom
noise orthogonal frequency division multiplexing (DZPN-OFDM) scheme. In
the proposed scheme, ZPN-OFDM non-zero part is damped to reduce its
energy, thus the mutual interference power in-between the data and
training blocks with conservative the pseudo-noise conventional
properties required for channel estimation or synchronization. The
motivation of this paper is the OFDM long guard interval working in wide
dispersion channels, whereas a significant energy is wasted when the
conventional ZPN-OFDM is used as well as the BER performance is also
degraded. Moreover, the proposed scheme doesn’t duplicate the guard
interval to solve the ZPN-OFDM spectrum efficiency loss problem. Both
detailed performance analysis and simulation results show that the
proposed DZPNOFDM scheme can, indeed, offer significant bit error rate,
spectrum efficiency and energy efficiency improvement.